Bimota YB4ie SP (1988)

The Bimota YB4 IE SP motorcycle was produced in a limited run of 15 units in 1988. It features a four stroke, transverse four cylinder engine with DOHC and 5 valves per cylinder. The bike has a capacity of 749 cc and a compression ratio of 11.2:1. It also has a Weber Marelli electronic fuel injection system and CDI ignition. The motorcycle has a maximum power output of 89 kW (121 hp) at 10500 rpm and a maximum torque of 88.3 Nm (65.1 ft-lbs) at 8500 rpm. The bike has a six-speed transmission and a chain final drive.

The frame of the YB4 IE SP is made of two diagonal beams in section bar made of aluminum with internal ribbing. It has a swing arm made of aluminum and the cylinders are supported by plates bolted to the beams. The front suspension features 42mm gas telescopic forks with external adjustment for anti-dive, while the rear suspension has a gas single shock with external adjustment. The front and rear brakes consist of two 320mm discs and a single 230mm disc, respectively. The front and rear tires are 3.50-17 and 5.50-17, respectively.

The dry weight of the motorcycle is 180 kg (396.8 lbs) and it has a fuel capacity of 20 liters (5.3 US gallons). The average consumption is 6.5 l/100km (36.2 mpg). In terms of braking, the bike can come to a stop from 60-0 in 13.2 meters (43.3 feet) and from 100-0 in 36.0 meters (118.1 feet). In a standing quarter mile, the bike recorded a time of 10.8 seconds at a speed of 201.8 km/h (125.4 mph). The bike was reviewed by several motorcycle publications including Motosprint, Motorrad, and Moto.Revue, and was compared to the YB4 vs RC30 and YB4 vs FZR750R motorcycles.

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Technical specifications:

Make Model: Bimota YB4 EI SP

Year: 1988

Production: 15 units

Engine: Four stroke, transverse four cylinder, DOHC, 5 valves per cylinder.

Capacity: 749 cc / 45.7 cub. in.

Bore x Stroke: 68 x 51.6 mm

Compression Ratio: 11.2:1

Cooling System: Liquid cooled

Induction: Weber Marelli electronic fuel injection

Ignition: CDI

Starting: Electric

Max Power: 89 KW / 121 hp @ 10500rpm

Max Power Rear Tyre: 72.7 kW / 97.5 hp @ 10400 rpm

Max Torque: 88.3 Nm / 9.0kgf-m / 65.1 [email protected] 8500rpm

Transmission: 6 Speed

Final Drive: Chain

Frame: Two diagonal beams in section bar made of aluminium with internal ribbing. The cylinders are supported by plates bolted to the beams and the swing arm is made of aluminium

Front Suspension: 42mm Gas telescopic forks, external adjustment for anti-dive

Rear Suspension: Gas single shock, external adjustment

Front Brakes: 2x 320mm discs

Rear Brakes: Single 230mm disc

Front Tyre: 3.50-17

Rear Tyre: 5.50-17

Dry Weight: 180 kg / 396.8 lbs.

Fuel Capacity: 20 Litres / 5.3 US gal

Consumption average: 6.5 l/100km / 36.2 mpg

Braking 60 – 0 / 100 – 0: 13.2 m / 36.0 m 43.3 ft / 118.1 ft.

Standing 1/4 Mile: 10.8 sec / 201.8 km/h / 125.4 mph

Road Test: Motosprint Group Test Moto.Journal Moto.Revue In.Moto YB4 vs RC30 BIKE Motorrad Motorrad YB4 vs FZR750R